US20100103689A1 - Lamp device for an automobile - Google Patents

Lamp device for an automobile Download PDF

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Publication number
US20100103689A1
US20100103689A1 US12/604,510 US60451009A US2010103689A1 US 20100103689 A1 US20100103689 A1 US 20100103689A1 US 60451009 A US60451009 A US 60451009A US 2010103689 A1 US2010103689 A1 US 2010103689A1
Authority
US
United States
Prior art keywords
lamp
housing part
housing
inner space
lamp device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/604,510
Other languages
English (en)
Inventor
Cheng-Shih Lee
Hsin-Yi Hsieh
Chou-Chih Yin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bright Led Electronics Corp
Original Assignee
Bright Led Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bright Led Electronics Corp filed Critical Bright Led Electronics Corp
Assigned to BRIGHT LED ELECTRONICS CORP. reassignment BRIGHT LED ELECTRONICS CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HSIEH, HSIN-YI, LEE, CHENG-SHIH, YIN, CHOU-CHIH
Publication of US20100103689A1 publication Critical patent/US20100103689A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F21S45/435—Forced cooling using gas circulating the gas within a closed system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lamp device, more particularly to a lamp device for an automobile.
  • a conventional head lamp device 1 for an automobile is shown to include a lamp housing 11 embedded in an automobile body 100 of the automobile and having a front open side, a transparent lamp cap 12 mounted on the front open side of the lamp housing 11 and cooperating with the lamp housing 11 to define an inner space 10 , a heat-conductive base unit 13 disposed in the inner space 10 and including a plurality of heat-dissipating fins 131 , and a plurality of light emitting diodes 14 mounted on the base unit 13 .
  • the conventional head lamp device 1 In use, heat generated by the light emitting diodes 14 is dissipated outside through the lamp cap 12 using cool air flowing toward the lamp cap 12 . Therefore, the conventional head lamp device 1 has a poor heat dissipating efficiency. Moreover, when the automobile is activated, heat radiated by an engine (not shown) is conducted to the lamp housing 11 , thereby increasing temperature of the inner space 10 . As a result, the service life of the conventional lamp device 1 is adversely affected.
  • an object of the present invention is to provide a lamp device for an automobile that can overcome the aforesaid drawback of the prior art.
  • a lamp device for an automobile comprising:
  • a lamp housing adapted to be embedded in an automobile body of the automobile and including an inner housing part, and an outer housing part coupled to and disposed outwardly around the inner housing part, the outer housing part having a thermal conductivity coefficient less than that of the inner housing part;
  • a transparent lamp cap mounted to the lamp housing, adapted to be exposed from the automobile body and cooperating with the inner housing part of the lamp housing to define a first inner space therebetween;
  • a lighting module disposed in the first inner space and including at least one light emitting diode.
  • FIG. 1 is a schematic sectional view of a conventional head lamp device for an automobile
  • FIG. 2 is a schematic sectional view showing the first preferred embodiment of a lamp device for an automobile according to the present invention
  • FIG. 3 is a schematic sectional view showing the second preferred embodiment of a lamp device for an automobile according to the present invention.
  • FIG. 4 is a schematic sectional view showing the third preferred embodiment of a lamp device for an automobile according to the present invention.
  • FIG. 5 is a schematic sectional view showing the fifth preferred embodiment of a lamp device for an automobile according to the present invention.
  • the first preferred embodiment of a lamp device 2 for an automobile according to the present invention is shown to include a lamp housing 21 , a transparent lamp cap 22 , and a lighting module 23 .
  • the lamp housing 21 is adapted to be embedded in an automobile body 200 of the automobile, and includes an inner housing part 211 , and an outer housing part 212 coupled to and disposed outwardly around the inner housing part 211 .
  • the outer housing part 212 has a thermal conductivity coefficient less than that of the inner housing part 211 .
  • each of the inner and outer housing parts 211 , 212 is made of plastic material.
  • the thermal conductivity coefficient of the inner housing part 211 is not less than 50 W/mK, and the thermal conductivity coefficient of the outer housing part 212 is not greater than 5 W/mK.
  • the thermal conductivity coefficients of the inner and outer housing parts 211 , 212 are 100 W/mK and 2 W/mK, respectively.
  • the inner housing part 211 is U-shaped in cross section.
  • the lamp housing 21 has an open side 216 adapted to be exposed from the automobile body 200 .
  • the lamp cap 22 is mounted on the open side 216 , and cooperates with the inner housing part 211 to define a first inner space 210 therebetween.
  • the inner housing part 211 cooperates with the outer housing part 212 to define a second inner space 213 .
  • the inner housing part 211 is formed with a plurality of first through holes 214 so that the first inner space 210 is in spatial communication with the second inner space 213 via the first through holes 214 .
  • the outer housing part 212 is formed with a plurality of second through holes 215 in spatial communication with the second inner space 213 .
  • the lighting module 23 is disposed in the first inner space 210 , and includes a heat-conductive base 231 , a plurality of light emitting diodes 232 mounted on the heat-conductive base 231 , and a plurality of heat-dissipating fins 233 connected integrally to the heat-conductive base 231 .
  • the lamp device 2 further includes a plurality of filter members 24 , such as filter nets, mounted on the outer housing part 212 for filtering air into the second inner space 213 through the second through holes 215 . Due to the presence of filter member 24 , accumulation of dust on the heat-dissipating fins 233 can be prevented, thereby ensuring heat-dissipating efficiency of the heat-dissipating fins 233 .
  • filter members 24 such as filter nets
  • the lamp device 2 serves as a head lamp device
  • the thermal conductivity coefficient of the outer housing part 212 is relatively low
  • heat radiated by an engine of the automobile during activation can be effectively isolated from the lamp housing 21 .
  • the thermal conductivity coefficient of the inner housing part 211 is relatively high
  • heat generated by the light emitting diodes 232 can be effectively conducted to the inner housing part 211 .
  • hot air in the first inner space 210 can flows into the second inner space 213 through the first through holes 214 such that temperature in the lamp housing 21 is uniform.
  • the lamp device 2 of this invention has a superior heat dissipating efficiency, thereby ensuring the service life thereof.
  • FIG. 3 illustrates the second preferred embodiment of a lamp device ( 2 a ) for an automobile according to this invention, which is a modification of the first preferred embodiment.
  • the second through holes ( 215 a ) are formed in the open side 216 of the lamp housing ( 21 a ) and are disposed adjacent to the lamp cap 22 .
  • the lamp housing ( 21 a ) further includes a plurality of blocking pieces 217 mounted in the second inner space 213 .
  • each of the blocking pieces 217 is disposed adjacent to a corresponding one of the through holes ( 215 a ) in the open side 216 of the lamp housing ( 21 a ), and is connected integrally to the inner housing part 211 so that a gap 218 is formed between a corresponding one of the blocking pieces 217 and the outer housing part 212 , and is distal from the corresponding one of the second through holes ( 215 a ) in the open side 216 of the lamp housing ( 21 a ). Due to the presence of the blocking pieces 217 , insects can be prevented from entering into the second inner space 213 .
  • the filter members 24 are mounted on the inner housing part 211 of the lamp housing ( 21 a ) for filtering air into the first inner space 210 through the first through holes 214 in the inner housing part 211 .
  • FIG. 4 illustrates the third preferred embodiment of a lamp device ( 2 b ) for an automobile according to this invention, which is a modification of the second preferred embodiment.
  • the outer housing part 212 has a side 2121 opposite to the open side 216 of the lamp housing ( 21 b ) and formed with a plurality of third through holes ( 215 b ).
  • external cool air flows into the second inner space 213 via the second through holes ( 215 a ), absorbs heat accumulated in the second inner space 213 , and flows out of the outer housing part 212 via the third through holes ( 215 b ), thereby enhancing the heat dissipating efficiency of the lamp device ( 2 b ) of this invention.
  • FIG. 5 illustrates the fourth preferred embodiment of a lamp device ( 2 c ) for an automobile according to this invention, which is a modification of the third preferred embodiment.
  • the lamp device ( 2 c ) further includes a fan unit 25 disposed in the first inner space 210 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US12/604,510 2008-10-24 2009-10-23 Lamp device for an automobile Abandoned US20100103689A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW097140975 2008-10-24
TW097140975A TW201016501A (en) 2008-10-24 2008-10-24 LED vehicle lamp device

Publications (1)

Publication Number Publication Date
US20100103689A1 true US20100103689A1 (en) 2010-04-29

Family

ID=42117328

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/604,510 Abandoned US20100103689A1 (en) 2008-10-24 2009-10-23 Lamp device for an automobile

Country Status (2)

Country Link
US (1) US20100103689A1 (enrdf_load_stackoverflow)
TW (1) TW201016501A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160186956A1 (en) * 2014-12-26 2016-06-30 Coretronic Corporation Vehicle lighting device and fabrication method thereof
US20170030568A1 (en) * 2013-12-02 2017-02-02 Lg Innotek Co., Ltd. Heat sink and lighting apparatus
US20200088381A1 (en) * 2018-09-19 2020-03-19 Koito Manufacturing Co., Ltd. Vehicle lamp

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060181894A1 (en) * 2005-02-16 2006-08-17 Visteon Global Technologies, Inc. Headlamp assembly having cooling channel
US20070091632A1 (en) * 2005-10-25 2007-04-26 Visteon Global Technologies, Inc. Convectively cooled headlamp assembly
US20080094841A1 (en) * 2002-08-23 2008-04-24 Dahm Jonathan S Method and apparatus for using light emitting diodes
US20080117647A1 (en) * 2004-12-22 2008-05-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Lighting Device Comprising at Least One Light-Emitting Diode and Vehicle Headlight
US20080225537A1 (en) * 2007-03-15 2008-09-18 Valeo Vision Lighting and/or signalling device for a motor vehicle comprising an outer wall provided with a heat exchange zone

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080094841A1 (en) * 2002-08-23 2008-04-24 Dahm Jonathan S Method and apparatus for using light emitting diodes
US20080117647A1 (en) * 2004-12-22 2008-05-22 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Lighting Device Comprising at Least One Light-Emitting Diode and Vehicle Headlight
US20060181894A1 (en) * 2005-02-16 2006-08-17 Visteon Global Technologies, Inc. Headlamp assembly having cooling channel
US20070091632A1 (en) * 2005-10-25 2007-04-26 Visteon Global Technologies, Inc. Convectively cooled headlamp assembly
US20080225537A1 (en) * 2007-03-15 2008-09-18 Valeo Vision Lighting and/or signalling device for a motor vehicle comprising an outer wall provided with a heat exchange zone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170030568A1 (en) * 2013-12-02 2017-02-02 Lg Innotek Co., Ltd. Heat sink and lighting apparatus
US10247403B2 (en) * 2013-12-02 2019-04-02 Lg Innotek Co., Ltd. Heat sink and lighting apparatus
US20160186956A1 (en) * 2014-12-26 2016-06-30 Coretronic Corporation Vehicle lighting device and fabrication method thereof
US20200088381A1 (en) * 2018-09-19 2020-03-19 Koito Manufacturing Co., Ltd. Vehicle lamp
US11060692B2 (en) * 2018-09-19 2021-07-13 Koito Manufacturing Co., Ltd. Vehicle lamp

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Publication number Publication date
TWI343336B (enrdf_load_stackoverflow) 2011-06-11
TW201016501A (en) 2010-05-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BRIGHT LED ELECTRONICS CORP.,TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LEE, CHENG-SHIH;HSIEH, HSIN-YI;YIN, CHOU-CHIH;REEL/FRAME:023413/0891

Effective date: 20091014

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION